code: def test_class_getitem_with_builtins(self):
      class A(dict):
          called_with = None
  
          def __class_getitem__(cls, item):
              cls.called_with = item
  
      class B(A):
          pass
  
      self.assertIs(B.called_with, None)
      B[int]
      self.assertIs(B.called_with, int)
  
imports: import unittest
  from test import support
label_desc: Use image node_id 7 for calling the TestClassGetitem obj's underlying member method code with example usage: obj.test_class_getitem_with_builtins() without return types